Rovi, which sells television guide programs to cable providers, lost a patent fight with Amazon.com on Tuesday when a federal appeals court upheld a U.S. district judge's ruling in favor of the world's largest online retailer. Rovi had accused Amazon of infringing on two patents, one that creates an electronic program guide on a television screen and another that allows a viewer to select and purchase a pay-per-view program. In both patents, Judge Richard Andrews of the U.S. District Court for the District of Delaware had narrowly defined what the "claims," or portions of patents, did in such a way that forced Rovi to drop its argument for infringement.
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